Intelligent safety helmet life sign monitoring and alarming system

Abstract

The application is suitable for the technical field of safety helmets, and particularly relates to an intelligent safety helmet vital sign monitoring and alarming system.The system comprises a skin temperature acquisition module, which comprises at least one flexible skin contact sensor and is used for acquiring the skin temperature of the head of a wearer in real time; an environmental thermal interference monitoring module, which is arranged at an exposed position outside the shell of the safety helmet and is used for acquiring the shell temperature and the ambient air temperature in real time; a dynamic differential compensation module, which is internally provided with a dynamic differential compensation algorithm and is used for correcting the skin temperature of the head and outputting the core body temperature; and an alarm output module, which is connected with the dynamic differential compensation module in signal and is used for alarming based on the corrected core body temperature.The application effectively eliminates the interference of environmental heat sources such as strong sunlight on the temperature measurement of the helmet by means of the double arrangement of the flexible skin sensor and the shell environmental temperature sensor and the combination of the dynamic differential compensation algorithm, and greatly reduces the temperature monitoring error.

Description

Technical Field

[0001] This invention belongs to the field of safety helmet technology, and in particular relates to an intelligent safety helmet vital signs monitoring and alarm system. Background Technology

[0002] The smart safety helmet is a modern safety protection device that integrates the Internet of Things, artificial intelligence, 5G communication, and various high-precision sensors. It upgrades the passive physical protection of traditional safety helmets into an active and intelligent comprehensive safety management platform. Through built-in positioning chips, vital sign monitoring modules, high-definition cameras, and gas sensors, it can perceive the wearer's location, health status, and surrounding environmental risks in real time, enabling functions such as precise positioning, trajectory tracking, hazard warning, one-click SOS emergency call, and remote audio and video collaboration.

[0003] Existing smart safety helmets monitor the vital signs of outdoor workers using a single temperature sensor. Due to the special nature of outdoor work, the outdoor environment will seriously affect the working effect of the temperature sensor. The temperature detected by the temperature sensor is difficult to accurately reflect the vital signs of the workers and is prone to false alarms. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent safety helmet vital signs monitoring and alarm system, which aims to solve the problem that existing intelligent safety helmets rely on a single temperature sensor to monitor the vital signs of outdoor workers. Due to the special nature of outdoor work, the outdoor environment will seriously affect the working effect of the temperature sensor, making it difficult for the temperature detected by the temperature sensor to accurately reflect the vital signs of the workers, and easily leading to false alarms.

[0005] This invention is implemented as follows: an intelligent safety helmet vital signs monitoring and alarm system, the system comprising: A skin temperature acquisition module, located at the point where the helmet liner contacts the wearer's forehead or temple skin, includes at least one flexible skin contact sensor for real-time acquisition of the wearer's scalp temperature. ; An environmental thermal interference monitoring module is installed at an exposed location on the outside of the safety helmet shell, and includes at least one shell ambient temperature sensor for real-time acquisition of shell temperature. and ambient temperature ; The dynamic differential compensation module is connected to both the skin temperature acquisition module and the environmental thermal interference monitoring module, and incorporates a dynamic differential compensation algorithm for monitoring scalp temperature. Perform calibration and output core body temperature. ; The alarm output module is connected to the dynamic differential compensation module and is used to output the corrected core body temperature. Call the alarm.

[0006] Preferably, the flexible skin contact sensor is a flat negative temperature coefficient thermistor with a thermally conductive silicone layer covering its surface, which fits tightly against the wearer's skin. The flexible skin contact sensor is positioned at the center of the helmet liner and the wearer's forehead, and an elastic buffer structure is provided between the back of the flexible skin contact sensor and the helmet liner to maintain the stability of the contact pressure between the sensor and the skin during wear.

[0007] Preferably, the skin temperature acquisition module includes a contact state detection unit, which is used to monitor the adhesion state between the flexible skin contact sensor and the skin in real time. When the sensor is detected to be detached from the skin or to have poor contact, an abnormal sensor signal is generated, and the use of the sensor's temperature data for body temperature correction is suspended.

[0008] Preferably, at least two ambient temperature sensors are provided, which are respectively installed on the top of the helmet shell in the area directly exposed to sunlight and the shaded area of ​​the brim, to acquire shell temperature distribution data through multi-point acquisition; A heat-insulating mounting base is provided between the ambient temperature sensor and the helmet shell, so that the probe of the ambient temperature sensor is in micro-gap contact with the shell and the probe of the ambient temperature sensor is exposed to the environment. The ambient temperature sensor for the outer shell also includes a temperature sensor for the insulation layer, which is located between the shell and the liner, and is used to collect the temperature of the inner wall of the insulation layer.

[0009] Preferred, The calculation formula is: ; in, and For compensation coefficient, This represents the rate of change of the outer casing temperature.

[0010] Preferably, the dynamic differential compensation module includes a Kalman filter for filtering the input temperature signal and the output corrected core body temperature to eliminate sensor noise and transient disturbances. The dynamic differential compensation module also includes a state recognition unit for identifying the current environmental state of the wearer based on the magnitude and direction of the shell temperature change rate, and dynamically adjusting the weight of the compensation coefficient.

[0011] Preferably, the alarm output module classifies the warning level based on the set threshold and core body temperature, where core body temperature is the core body temperature. When the temperature exceeds the first temperature threshold and remains above the first set time, a level one alarm is triggered, and a prompt sound is emitted via a local buzzer. When the temperature exceeds the second temperature threshold and remains above the second set time, a level two alarm is triggered, and alarm information is pushed to the remote monitoring platform via the wireless communication module and the safety officer is automatically dialed.

[0012] This invention effectively eliminates interference from environmental heat sources such as direct sunlight on helmet temperature measurement by employing a dual deployment of flexible skin sensors and an ambient temperature sensor on the helmet shell, combined with a dynamic differential compensation algorithm, thus significantly reducing temperature monitoring errors. Simultaneously, contact detection, multi-sensor fusion, and filtering ensure accurate and reliable alarms. Furthermore, with tiered alarms, adaptive thresholds, and cloud data storage, it achieves closed-loop management from precise monitoring to intelligent early warning, effectively improving the health and safety of high-risk workers. Attached Figure Description

[0013] Figure 1 This is an architecture diagram of an intelligent safety helmet vital signs monitoring and alarm system provided in an embodiment of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0015] like Figure 1 The diagram shown is an architecture diagram of an intelligent safety helmet vital signs monitoring and alarm system provided in an embodiment of the present invention. The system includes: A skin temperature acquisition module 100 is installed at the point where the helmet liner contacts the wearer's forehead or temple skin, and includes at least one flexible skin contact sensor for real-time acquisition of the wearer's scalp temperature. .

[0016] In this module, the skin temperature acquisition module 100 includes at least one flexible skin contact sensor. The flexible skin contact sensor is a flat negative temperature coefficient thermistor with a thermally conductive silicone layer covering its surface, which fits tightly against the wearer's skin. The flexible skin contact sensor is positioned at the center between the helmet liner and the wearer's forehead. An elastic buffer structure is provided between the back of the flexible skin contact sensor and the helmet liner to maintain the stability of the contact pressure between the sensor and the skin during wear. The number of flexible skin contact sensors can also be two or more, which directly contact the user's skin to collect the direct temperature of the scalp.

[0017] An environmental thermal interference monitoring module 200 is installed at an exposed location on the outside of the safety helmet shell, and includes at least one shell ambient temperature sensor for real-time acquisition of shell temperature. and ambient temperature .

[0018] In this module, the environmental thermal interference monitoring module 200 includes at least two shell ambient temperature sensors, which are respectively installed on the top of the helmet shell in the area directly exposed to sunlight and the shaded area of ​​the brim. These sensors acquire shell temperature distribution data through multi-point acquisition, with one shell ambient temperature sensor used to monitor the temperature of the helmet shell. Another ambient temperature sensor is used to directly monitor the ambient air temperature. The ambient thermal interference monitoring module 200 also includes a contact state detection unit for real-time monitoring of the contact state between the flexible skin contact sensor and the skin. When the sensor is detected to be detached from the skin or to have poor contact, an abnormal sensor signal is generated, and the use of the sensor's temperature data for body temperature correction is suspended. The ambient temperature sensor also includes a heat insulation layer temperature sensor located between the cap shell and the cap liner for collecting the temperature of the inner wall of the heat insulation layer. .

[0019] The dynamic differential compensation module 300 is connected to the skin temperature acquisition module and the environmental thermal interference monitoring module respectively, and has a built-in dynamic differential compensation algorithm for monitoring scalp skin temperature. Perform calibration and output core body temperature. .

[0020] In this module, compensation coefficients are obtained by conducting multi-condition calibration experiments in a standard environmental simulation chamber beforehand. and If a temperature sensor for the insulation layer is installed, a compensation coefficient should be added. The standard environmental simulation chamber is used to control ambient temperature, light radiation intensity, and wind speed, covering various work scenarios from shade to direct sunlight, and from no wind to strong winds. During the experiment, a smart safety helmet is worn on the head of a human model or a real subject, and a high-precision medical thermometer is used to record the core body temperature simultaneously. As a true value, skin temperature was collected. , , and The optimal compensation coefficient is fitted using the least squares method or neural network regression, where: ; If a temperature sensor for the insulation layer is not installed, then it should be discarded. , Used to characterize the temperature difference between the outer shell and the inner wall of the insulation layer, this temperature difference directly reflects the intensity of heat flow through the insulation layer, thereby more accurately estimating the remaining heat conducted to the skin sensor and improving the accuracy of body temperature correction under extreme sun exposure or changes in insulation layer performance.

[0021] The dynamic differential compensation module includes a Kalman filter to filter the input temperature signal and the output corrected core body temperature, eliminating sensor noise and transient disturbances. The module also includes a state recognition unit to identify the wearer's current environmental state based on the magnitude and direction of the shell temperature change rate, and dynamically adjust the weights of the compensation coefficients. Specifically: Prolonged exposure to sunlight: Temperature change rate If the temperature rises continuously for more than 5 minutes, it indicates that the outer casing is continuously heating up. The system then uses high-weight compensation to increase the temperature. The value is used to suppress the influence of conductive heat; Entering the shade: Rate of temperature change When the absolute value is greater than the preset value, it indicates that the wearer has moved from a sun-exposed area to a shaded area, and the outer shell cools down rapidly. At this time, the system activates transient compensation to increase... The weighting of the sensor should be adjusted to avoid falsely high body temperature due to sensor response lag. When entering or exiting an air-conditioned area: Rapidly decreasing and ambient temperature When the temperature drops synchronously, it is identified as entering an air-conditioned environment, and the compensation coefficient is reduced to prevent excessive correction that could lead to a lower body temperature.

[0022] Through this state recognition mechanism, the compensation algorithm can adapt to rapid changes in different thermal environments and maintain high-precision output even under unsteady conditions.

[0023] The alarm output module 400 is connected to the dynamic differential compensation module and is used to output the corrected core body temperature. Call the alarm.

[0024] In this module, the alarm output module classifies warning levels based on the set threshold and core body temperature. When the temperature exceeds the first temperature threshold and remains above the first set time, a level one alarm is triggered, and a prompt sound is emitted via a local buzzer. When the temperature exceeds the second temperature threshold and remains above the second set time, a level two alarm is triggered, and alarm information is pushed to the remote monitoring platform via the wireless communication module and the safety officer is automatically dialed.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart safety helmet vital signs monitoring and alarm system, characterized in that, The system includes: A skin temperature acquisition module, located at the point where the helmet liner contacts the wearer's forehead or temple skin, includes at least one flexible skin contact sensor for real-time acquisition of the wearer's scalp temperature. ; An environmental thermal interference monitoring module is installed at an exposed location on the outside of the safety helmet shell, and includes at least one shell ambient temperature sensor for real-time acquisition of shell temperature. and ambient temperature ; The dynamic differential compensation module is connected to both the skin temperature acquisition module and the environmental thermal interference monitoring module, and incorporates a dynamic differential compensation algorithm for monitoring scalp temperature. Perform calibration and output core body temperature. ; The alarm output module is connected to the dynamic differential compensation module and is used to output the corrected core body temperature. Call the alarm.

2. The intelligent safety helmet vital signs monitoring and alarm system according to claim 1, characterized in that, The flexible skin contact sensor is a flat negative temperature coefficient thermistor with a thermally conductive silicone layer on its surface, which fits tightly against the wearer's skin. The flexible skin contact sensor is positioned in the center between the helmet liner and the wearer's forehead, and an elastic buffer structure is provided between the back of the flexible skin contact sensor and the helmet liner to maintain the stability of the contact pressure between the sensor and the skin during wear.

3. The intelligent safety helmet vital signs monitoring and alarm system according to claim 1, characterized in that, The skin temperature acquisition module includes a contact state detection unit, which is used to monitor the adhesion state between the flexible skin contact sensor and the skin in real time. When the sensor is detected to be detached from the skin or to have poor contact, an abnormal sensor signal is generated, and the use of the sensor's temperature data for body temperature correction is suspended.

4. The intelligent safety helmet vital signs monitoring and alarm system according to claim 1, characterized in that, At least two ambient temperature sensors are provided, one installed on the top of the helmet shell in the area directly exposed to sunlight and the other in the shaded area of ​​the brim, to collect temperature distribution data of the shell through multi-point acquisition. A heat-insulating mounting base is provided between the ambient temperature sensor and the helmet shell, so that the probe of the ambient temperature sensor is in micro-gap contact with the shell and the probe of the ambient temperature sensor is exposed to the environment. The ambient temperature sensor for the outer shell also includes a temperature sensor for the insulation layer, which is located between the shell and the liner, and is used to collect the temperature of the inner wall of the insulation layer.

5. The intelligent safety helmet vital signs monitoring and alarm system according to claim 1, characterized in that, The calculation formula is: ； in, and For compensation coefficient, This represents the rate of change of the outer casing temperature.

6. The intelligent safety helmet vital signs monitoring and alarm system according to claim 5, characterized in that, The dynamic differential compensation module includes a Kalman filter for filtering the input temperature signal and the output corrected core body temperature to eliminate sensor noise and transient disturbances. The dynamic differential compensation module also includes a state recognition unit for identifying the current environmental state of the wearer based on the magnitude and direction of the shell temperature change rate, and dynamically adjusting the weight of the compensation coefficient.

7. The intelligent safety helmet vital signs monitoring and alarm system according to claim 5, characterized in that, The alarm output module classifies warning levels based on a set threshold and core body temperature. When the temperature exceeds the first temperature threshold and remains above the first set time, a level one alarm is triggered, and a prompt sound is emitted via a local buzzer. When the temperature exceeds the second temperature threshold and remains above the second set time, a level two alarm is triggered, and alarm information is pushed to the remote monitoring platform via the wireless communication module and the safety officer is automatically dialed.

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